They told me to bring a substitute when I said I wanted to quit the job.

When I said I wanted to quit the job, they told me to bring a substitute. What should I do?

You have the right to quit.

According to the civil law of Japan, you can quit the job if you make a declaration to quit and your employer agrees to it. You can also quit even if your employer doesn't agree if two weeks is passed since you made the declaration to quit.

Therefore, even if you were told to bring a substitute, you can quit without bringing one if two weeks is passed since you made the declaration to quit.

However, you should be concerned about listed below.
・Tell the reason why you want to quit
・Tell them early that you want to quit in order to enable your employer to find new workers and adjust for the new structure.

Be careful if the period of your work is already fixed

If the period of your work is already fixed, essentially, you have to go to work during the period. Even if you don't break the law, you may be caused indemnity if there is a loss to the company due to your resignation. If you want to quit during the period already fixed, talk to your employer and get their consent to quit.

Be careful for "Black Baito"

Under the law, part-time works are prohibited from having the employees overwork.
However, there are some companies or stores that break these laws because they are short of workers. They are called "Black Baito" .

・Forced to work longer than the fixed time
・Not allowed to be off work even before exams
・Cannot quit unless bringing a substitute
・Do not get paid extra for working in midnight
etc.

If you face such problems listed above, have contact with consulting service listed below.

Summary

Even if you were told to bring a substitute, if the period is not fixed, you can quit after two weeks passes after you make a declaration to quit. However, try the best to make sure both sides agree to the resignation.

If the period is already fixed, you essentially have to work during the period. If you want to quit during the fixed period, you must talk with your employer.